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Effects of mutual intercropping on cadmium accumulation by the accumulator plants Conyza canadensis, Cardamine hirsuta, and Cerastium glomeratum

Author:
Xia, Hui, Liang, Dong, Chen, Fabo, Liao, Ming'an, Lin, Lijin, Tang, Yi, Lv, Xiulan, Li, Huanxiu, Wang, Zhihui, Wang, Xun, Wang, Jin, Liu, Li, Ren, Wei
Source:
International journal of phytoremediation 2018 v.20 no.9 pp. 855-861
ISSN:
1549-7879
Subject:
Cardamine hirsuta, Cerastium, Conyza canadensis, cadmium, coculture, intercropping, phytomass, phytoremediation, polluted soils, roots, shoots
Abstract:
In this study, three cadmium (Cd) accumulator species (Conyza canadensis, Cardamine hirsuta, and Cerastium glomeratum) were co-cultured in Cd-contaminated soil in pots to study the effects of intercropping on co-remediation. Only C. canadensis intercropped with C. glomeratum, C. hirsuta intercropped with C. glomeratum, and three-species intercropping increased plant biomass compared with their respective monocultures. The treatments of C. canadensis intercropped with C. glomeratum and three-species intercropping increased the Cd contents in roots and shoots of C. canadensis, whereas the other intercropping treatments decreased or had no significant impact on Cd contents. As for Cd accumulation, the treatments of C. canadensis intercropped with C. glomeratum, C. hirsuta intercropped with C. glomeratum, and three-species intercropping increased Cd accumulation in a single plant compared with that of their respective monocultures, whereas other intercropping treatments decreased Cd accumulation in individual plants. Only the treatments of C. canadensis intercropped with C. glomeratum and C. hirsuta intercropped with C. glomeratum increased Cd accumulation in shoots of a single pot compared with that of their respective monocultures. Therefore, C. canadensis intercropped with C. glomeratum and C. hirsuta intercropped with C. glomeratum may improve the phytoremediation efficiency for Cd-contaminated soil.
Agid:
5958988